Continuous Insulation - Spray Polyurethane Foam vs. Rigid Foam Board

The design of exterior wall assemblies has become increasingly focused on performance for greater energy efficiency and resistance to air and water penetration. The 2015 International Energy Conservation Code and ASHRAE 90.1 now requires insulation that is continuous in wall assemblies, (i.e. not interrupted by studs, framing, etc.) in all eight climate zones within the United States. This push for continuous insulation in exterior wall assemblies is also reflected in green building standards and the desires of building owners to reduce energy costs.

In this presentation, we will look at the performance, installation and cost advantages of medium density spray foam insulation compared to the commonly used rigid foam board in continuous insulation applications.